The Chinese authorities have admitted that the large-scale migration from China may have triggered the March protests in Lhasa. According to a report posted on its site by the International Campaign for Tibet, the TAR Deputy Party Secretary Zhang Yijiong acknowledged that there had been many 'problems' with management of the 'floating population' of Chinese migrant workers to Tibet, particularly since the opening of the Qinghai-Tibet railway. Zhang, who was speaking at a government conference in Lhasa on September 2, specifically linked this problems to the security situation when saying that "All areas and all departments in Tibet should from the strategic high ground of protecting state security and protecting Tibet's stability deeply understand the important significance of carrying out well service and management work for the floating population in Tibet."